Ticker · held by 5 filers

IBKR

INTERACTIVE BROKERS GROUP IN

All tracked filers currently holding IBKR, ranked by position size. Each row links through to the filer's full portfolio.

Total value held

$1.45B

Total shares

14,065,143

Filers holding

5 · 7 positions

Caveat

long only · 13F-eligible managers only

Filers holding IBKR

sorted by position size · click any filer to see their full portfolio

# Filer Class Shares Value (USD) % of port

1 BlackRock · Larry Fink COM CL A 9,301,894 $1.14B 0.03%

2 Citadel Advisors · Ken Griffin PUTCOM CL A 1,258,700 $80.9M 0.01%

3 Citadel Advisors · Ken Griffin CALLCOM CL A 977,200 $62.8M 0.01%

4 Soros Fund Management · George Soros / Robert Soros COM CL A 771,480 $49.6M 0.57%

5 Citadel Advisors · Ken Griffin COM CL A 650,534 $41.8M 0.01%

6 Renaissance Technologies · Jim Simons (founder) COM CL A 616,395 $39.6M 0.06%

7 Bridgewater Associates · Ray Dalio (founder) COM CL A 488,940 $31.4M 0.11%

What this is

This page reverses the usual 13F view: instead of "what does Buffett hold," it answers "who holds NVDA?" Across the dozen tracked filers, all current 13F-disclosed holders of IBKR are listed, with the position size and what fraction of each filer's overall portfolio it represents.

Caveats: only the filers tracked here are included (~12 names) — not the whole 13F universe (~6,000 filers). Position values are at the most recent quarter-end, not current market price. Only long positions are visible; shorts and synthetics aren't.

v0.2 · 2026 · data via SEC EDGAR · CUSIP→ticker via OpenFIGI